Simple theory for predicting the natural convective energy loss from side-facing solar cavity receivers
A simple theory for predicting the convective energy loss from side-facing cavity receivers in windless environments has been developed. The approach used is to determine the velocity distribution of the incoming air in the aperture plane (and thereby the rate of mass entrainment); and then to estimate the bulk temperature of the heated emerging air. The convective loss is then calculated from an energy balance. To illustrate this theory, numerical results applicable to the 2.15 meter cubic cavity being tested in the laboratory are provided.
- Research Organization:
- Sandia National Labs., Livermore, CA (USA); California Univ., Berkeley (USA). Coll. of Engineering
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 6883428
- Report Number(s):
- SAND81-8201
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
14 SOLAR ENERGY
140702 -- Solar Thermal Power Systems-- Central Receiver
141000* -- Solar Collectors & Concentrators
AIR
AIR FLOW
CALCULATION METHODS
CAVITY RECEIVERS
CONVECTION
CSP
Concentrating Solar Power
ENERGY LOSSES
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HEAT LOSSES
HEAT TRANSFER FLUIDS
LOSSES
MATHEMATICAL MODELS
NATURAL CONVECTION
SOLAR RECEIVERS
VELOCITY
140702 -- Solar Thermal Power Systems-- Central Receiver
141000* -- Solar Collectors & Concentrators
AIR
AIR FLOW
CALCULATION METHODS
CAVITY RECEIVERS
CONVECTION
CSP
Concentrating Solar Power
ENERGY LOSSES
FLUID FLOW
FLUIDS
GAS FLOW
GASES
HEAT LOSSES
HEAT TRANSFER FLUIDS
LOSSES
MATHEMATICAL MODELS
NATURAL CONVECTION
SOLAR RECEIVERS
VELOCITY